Rachel Whiteread (born 1963 in London; lives and works in London) considers furniture and its forms and connotations the starting point for much of her artwork. As she acknowledges, she uses furniture as a metaphor for human beings. For a 1988 gallery show, Whiteread filled used furniture with wet plaster, removing the wood when it had set. What remained were the spaces inbetween and around the furniture. Whiteread has since cast beds, sinks, floors, doors, stairways, rooms and buildings in plaster, rubber, and wax. Her work makes the negative space - the container of memories - visible.
Poly Shelf 2009 Polyurethane, 15 x 66 x 23 cm (6 x 26 x 9"), limited to an edition of 300, with a signed and numbered certificate. To produce the shelves illustrated, a packing polystyrene element for an Apple computer - a negative shape to hold the object - was re-cast in white polyurethane.